Enhancement of palm oil refinery waste - Spent bleaching earth (SBE) into bio organic fertilizer and their effects on crop biomass growth
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- 作者：Soh Kheang Loh ; Stephen James ; Muzzamil Ngatiman ; Kah Yein Cheong ; Yuen May Choo ; Weng Soon Lim
- 关键词：Spent bleaching earth ; Composting ; Soil amendment ; Bio organic fertilizer ; Slow release property ; Plant growth
- 刊名：Industrial Crops and Products
- 出版年：2013
- 出版时间：August, 2013
- 年：2013
- 卷：49
- 期：Complete
- 页码：775-781
- 全文大小：1406 K
文摘
Spent bleaching earth (SBE) derived from the degumming and bleaching of crude palm oil (CPO) from physically refined palm oil is commonly disposed off at landfills at a high cost. Its disposal has so far led to environmental degradation but has not been addressed. This study demonstrates the innovative utilization of SBE as a bio organic fertilizer. The SBE was co-composted with some agricultural and palm oil milling by-products. Composted SBE has a positive impact on soil physical attributes for plant growth and microbial rejuvenation due to adequate amounts of beneficial mineral elements; improved organic carbon (OC); cation exchange capacity (CEC); water-holding capacity and C:N ratio. The pot and field trials carried out indicate highly significant increases in the productivity of okra (Abelmoschus esculentus), kangkung (Ipomoea aquatic) and groundnut magenta with 2-fold increases (35-60 % ) on average in fresh and dry matters production.